From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 14E9319A6; Tue, 28 Nov 2023 22:57:21 -0800 (PST) Received: from kwepemm000013.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4Sg95c6WYQzsRX9; Wed, 29 Nov 2023 14:53:40 +0800 (CST) Received: from huawei.com (10.175.112.208) by kwepemm000013.china.huawei.com (7.193.23.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.35; Wed, 29 Nov 2023 14:57:18 +0800 From: Guo Mengqi To: , , , , , CC: Subject: [PATCH RESEND v6 2/2] dt-bindings: dma: HiSilicon: Add bindings for HiSilicon Ascend sdma Date: Wed, 29 Nov 2023 14:53:05 +0800 Message-ID: <20231129065305.70364-3-guomengqi3@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20231129065305.70364-1-guomengqi3@huawei.com> References: <20231129065305.70364-1-guomengqi3@huawei.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-ClientProxiedBy: dggems701-chm.china.huawei.com (10.3.19.178) To kwepemm000013.china.huawei.com (7.193.23.81) X-CFilter-Loop: Reflected Add device-tree binding documentation for sdma hardware on HiSilicon Ascend SoC families. Signed-off-by: Guo Mengqi Reviewed-by: Rob Herring --- .../bindings/dma/hisilicon,ascend-sdma.yaml | 73 +++++++++++++++++++ 1 file changed, 73 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml diff --git a/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml b/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml new file mode 100644 index 000000000000..7b452b54fe0c --- /dev/null +++ b/Documentation/devicetree/bindings/dma/hisilicon,ascend-sdma.yaml @@ -0,0 +1,73 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/dma/hisilicon,ascend-sdma.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: HiSilicon Ascend System DMA (SDMA) controller + +description: | + The Ascend SDMA controller is used for transferring data + in system memory. + +maintainers: + - Guo Mengqi + +allOf: + - $ref: dma-controller.yaml# + +properties: + compatible: + enum: + - hisilicon,ascend310-sdma + - hisilicon,ascend910-sdma + + reg: + maxItems: 1 + + '#dma-cells': + const: 1 + description: + Clients specify a single cell with channel number. + + dma-channel-mask: + minItems: 1 + maxItems: 2 + + iommus: + maxItems: 1 + + pasid-num-bits: + description: | + This tells smmu that this device supports iommu-sva feature. + This determines the maximum number of digits in the pasid. + maximum: 0x10 + + dma-coherent: true + + dma-can-stall: true + +required: + - compatible + - reg + - dma-channel-mask + - '#dma-cells' + - iommus + - pasid-num-bits + +additionalProperties: false + +examples: + - | + dma-controller@880e0000 { + compatible = "hisilicon,ascend310-sdma"; + reg = <0x880e0000 0x10000>; + dma-channel-mask = <0xff00>; + iommus = <&smmu 0x7f46>; + pasid-num-bits = <0x10>; + dma-coherent; + dma-can-stall; + #dma-cells = <1>; + }; + +... -- 2.17.1